I never let a mean rooster (3 out of ... probably forty) attack a second time. One was processed just because I didn’t trust him. He didn’t do anything, but he was too leery of me, and I became leery of him.
It was our first ever and I didn’t realize how easy it was to get another rooster. Especially with people giving them away. But yeah, if we ever have another that attacks, he definitely won’t do it a second time.
Thankfully right now the ones we have are sweeties.